2170557 has 20 divisors (see below), whose sum is σ = 3283456. Its totient is φ = 1428840.

The previous prime is 2170549. The next prime is 2170573. The reversal of 2170557 is 7550712.

It is not a de Polignac number, because 2170557 - 2³ = 2170549 is a prime.

It is a super-2 number, since 2×2170557² = 9422635380498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2170557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170537) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10182 + ... + 10392.

2^2170557 is an apocalyptic number.

2170557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2170557 is a deficient number, since it is larger than the sum of its proper divisors (1112899).

2170557 is a wasteful number, since it uses less digits than its factorization.

2170557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 2170557 is about 1473.2810322542. The cubic root of 2170557 is about 129.4763352255.

The spelling of 2170557 in words is "two million, one hundred seventy thousand, five hundred fifty-seven".